类退化椭圆型方程的边值问题 (1988年)

In this paper we consider an elliptic equation Y(u) = in a bounded damain with boundary,H(x,y) = 0 . We assume;a,Y> 0,c 0 in,and <0,i.e. ( 1 ) is elliptic equation.We have proved an existence and uniqueness theorem for boundary value problem of